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The Golden Circle is a 300 kilometre (186 mile) route to the three most popular natural attractions in Iceland: the Geysir Geothermal Area, Gullfoss Waterfall and Þingvellir National Park.

This sightseeing trail is easy to do within half a day from Reykjavík, either by self-drive or on one of many tours. Some of these tours have additional activities, such as snorkelling or snowmobiling, or are conducted in a unique style, such as by helicopter, or under the midnight sun.

Within the three locations of the Golden Circle are some of the clearest examples of Iceland’s fascinating geological forces, magnificent landscapes, and rich culture.

The Geysir Geothermal Area

Though this feature is currently in a phase of inactivity, its neighbour Strokkur more than makes up for it. Every five to ten minutes, it blasts a column of boiling water to heights that can reach over 40 metres (131 feet).

The surrounding area is dotted with fumaroles, hot springs, and mud-pits. There are also two other smaller geysers, Smiður and Litlí-Strokkur, that can be easily visited, as well as a hotel, restaurant, cafe and gift shop across the road.

Gullfoss Waterfall

The 'Golden Waterfall', Gullfoss one of the most beautiful and powerful waterfalls in Iceland, plummeting 32 metres (105 feet) in two tiers into the river gorge of the popular rafting river Hvítá. It is just a ten-minute drive from Geysir and is the furthest point on the Golden Circle from Reykjavík.

Gullfoss was very almost lost in the early 20th century when British developers sought to harness its incredible power for geothermal energy. Though they got the lease to the land, allowing them to go ahead with their plans, they met an unlikely adversary: the daughter of the farmer who owned it, Sigríður Tómasdóttir.

This resilient woman refused to see the waterfall, to which she and her sisters paved the first path, destroyed. She, therefore, walked over 200 kilometres (124 miles) to Reykjavík and back multiple times to meet with a lawyer in order to help change the decision.

Though the process was arduous and took years, eventually Sigríður managed to exhaust the resources of the businessmen and they withdrew their plans. Because of her, all Icelandic waterfalls are now protected from foreign investors, and she is considered one of Iceland’s first environmentalists and most important historical people.

Thingvellir National Park

The largest attraction of the Golden Circle is Þingvellir National Park. The Icelandic parliament was founded here in 930 and remained until the year 1798 before moving to Reykjavík, making it the original site of what is now the world’s longest ongoing parliament.

Today it is a UNESCO World Heritage Site and one of the most important places to visit in Iceland. This is not just for its historical and cultural values, but for also its magnificent landscape and dramatic geology.

Þingvellir is surrounded by a beautiful mountain and volcanic ranges, as it is located in a rift valley directly between the North American and Eurasian tectonic plates. This makes it one of the few places in the world where you can walk between the continents, in the Mid-Atlantic Rift.

The daring and qualified even have opportunities to snorkel or scuba dive in this no-mans-land, in a ravine filled with crystal-clear spring water called Silfra. The visibility here can exceed 100 metres (328 feet), revealing incredible geological sites. Though it never freezes over due to the constant flow of water into it, it is 2°C (35°C) throughout the year, thus underwater explorers are always equipped with protective suits.

Other sites of note are the magnificent Almannagjá gorge, which you can walk down into to reach the rift valley from the North American tectonic plate, and the beautiful lake Þingvallavatn, the largest lake in Iceland, which gleams to the south of the National Park.

Geysir is a famous hot spring in Haukadalur valley in South Iceland. Part of the ‘Golden Circle', Geysir gives its name to hot springs all over the world.

Though Geysir itself is hardly active anymore, the area features spectacular hot springs such as the powerful Strokkur, which spouts a vast amount of water every 10 minutes, around 15-20 meters into the air, Smidur and Litli-Strokkur.

North of Geysir are fumaroles, i.e. unlike the hot springs the emit hot water, only steam and gas emanate from these. You may be able to observe bright yellow stains at the fumaroles, this is native sulphur, which crysallizes from the steam. At the southern part of the geothermal area, called Thykkuhverir, you‘ll find various mud pots. Such mud pots are actually fumaroles that boil up through surface water/groundwater and may become steaming fumaroles during dry spells, rather than the usual boiling mudpots.

About 2 km from Geysir is an old preserved natural pool called Marteinslaug. One can bathe in it and it has room for 3-5 people at a time, but care should be taken, as the area around the pool is very delicate. The temperature is 39-43°C, depending on how you are positioned in the pool. The water is slightly muddy, as the pool is built on soil, and the bottom is slippery due to algae, so caution is advised.

In Haukadalur there has also been tree planting in recent times and today the forest Haukadalsskogur is one of the largest in South Iceland. Aspen, various types of pine, and other plants have been tried out there and experiments and research continue. We also recommend visiting the tree museum, built in the memory of forester Gunnar Freysteinsson. There are good paths and roads in the forest and the wood is specially designed to accommodate wheelchairs.

Haukadalur has been a church site since ancient time. The current wooden church was last rebuilt in 1938 but the variety and appearance of the church dates back to 1842, making it one of the oldest of its kind in Iceland.

Haukadalur is indeed a historical place. It was settled during the age of settlement and scholar Ari “The Wise“ Thorgilsson grew up there. The first pastoral school in Iceland was also built there.

For accommodation, Hotel Gullfoss is about 7 km from the Geysir area, and closer still is the Hotel Geysir.

Gullfoss ('Golden Waterfall') in Hvita river is one of the most beautiful and beloved waterfalls in Iceland and forms a part of the famous Golden Circle along with Thingvellir National Park and the Geysir geothemal area.

This mighty waterfall cascades 32 meters into the river gorge and you'll be able to stand close enough to feel the waterspray on your face. Hvita itself should not be missed by any fan of rafting, as it is one of the most popular rafting rivers in Iceland.

Geography

The first thing that visitors to the National Park notice is its sheer aesthetic beauty; dried magma fields, covered in Icelandic moss, sit carved by glacial springs and surrounded by a bowl of ancient mountain peaks.

Two of the greatest attractions in the park are the exposed North American and Eurasian tectonic plates; it is one of the only regions in the world where you can see geology such as this on land.

Visitors are encouraged to walk along the North American tectonic plate, where they can read more about the area’s fascinating formation and history, before descending into the valley below.

History

Þingvellir can be anglicised to ‘Fields of Parliament’, a nod to the area’s fascinating history and relevance to Icelandic culture. It is here, after all, that the world’s first democratically elected parliament that remains functioning, Alþingi, was formed in 930 AD.

It may seem unlikely that Vikings would want to be under such an uncombative government, but the thirty or so clans that lived in Iceland at the time sought to prosper in their harsh new environment.

The first gathering was such a success that the meetings became annual, and it became a place where disputes were settled, criminals were tried, and laws to the benefit of all were laid down.

This saw the birth of the Icelandic Commonwealth, a time of independence and freedom for the Icelandic people before they became constituents of the Norwegian monarchy. Sessions would continue to be held at Þingvellir until 1798.

Though the parliament was removed by the Danish at this time, it returned 1845 to Reykjavík.

Another major reason as to why Þingvellir is considered so important to Icelanders is the fact that this is where the decision was made to abandon the belief of Paganism and the Norse Gods; the people adopted Christianity in 1000 AD under threat of invasion from Norway.

This turning point in history was left to the pagan lawspeaker, Þorgeir Þorkelsson, who rested on the choice for one day and one night before reappearing to share his decision.

To symbolise the country’s change, he threw idols of his old deities into the northern waterfall Goðafoss, the name of which translates to ‘Waterfall of the Gods’.

Silfra Fissure

Þingvellir is one of the most widely visited attractions in Iceland, in large part due to the fact that it is home to the glacial spring, Silfra fissure, one of the top ten sites in the world for snorkellers and scuba divers.

Silfra (meaning ‘Silver’) is a submerged ravine within the park, boasting visibility of up to 100 metres (328 feet) and a temperature just above freezing. Participants in these tours will be attired at the Silfra carpark in neoprene hoodies and gloves, as well as an undersuit and drysuit for thermal protection.

Strokkur is found in the Geysir Geothermal Area, titled after the Great Geysir, which lent its name to all others across the world. It is the greatest active geyser on site; Geysir itself is in a period of inactivity. Strokkur erupts more regularly than Geysir ever did, blasting water to heights of around fifteen to twenty metres every five to ten minutes, although it is known to reach up to forty metres.

Strokkur and Haukadalur Valley

Strokkur is the primary feature of the Haukadalur valleyand the main reason why it is one of the most visited sites in the country. While Geysir will very occasionally still erupt to enormous heights, it is nowhere near reliable enough to justify the area’s popularity.

Haukadalur valley, however, has many other features that make it worth a visit. The natural beauty of the area is shaped by the forces of the earth; fumaroles, hot-springs, mud-pits and other little geysers are littered around, and the ground itself is dyed vividly by elements such as sulfur (yellow), copper (green) and iron (red).

Opposite the main geothermal area in Haukadalur Valley is a restaurant, cafe, hotel and luxury gift shop.

Science behind Strokkur

Active geysers like Strokkur are rare around the world, due to the fact that many conditions must be met for them to form. They are thus only found in certain parts of highly geothermal areas.

The first condition that is necessary is an intense heat source; magma must be close enough to the surface of the earth for the rocks to be hot enough to boil water. Considering that Iceland is located on top of the rift valley between the North American and Eurasian tectonic plates, this condition is met throughout most of the county.

Secondly, you will need a source of flowing underground water. In the case of Strokkur, this comes from the second largest glacier in the country, Langjökull. Meltwater from the glacier sinks into the surrounding porous lava rock, and travels underground in all directions.

Evidence of this flowing water can be found in Þingvellir National Park, where there are many freshwater springs flowing straight from the earth.

Finally, you need a complex plumbing system that allows a geyser to erupt, rather than just steam from the ground like a fumarole. Above the intense heat source, there must be space for the flowing water to gather like a reservoir. From this basin, there must be a vent to the surface. This vent must be lined with silica so that the boiling, rising water cannot escape before the eruption.

Environmental Issues with Strokkur

One of the main reasons that Geysir entered a period of inactivity was due to the fact soap used to be pumped into the vents to make the eruptions more dramatic; it damaged the structure of the vent and prevented water building up. Strokkur, therefore, is guarded against all interference, with chains keeping visitors a good distance away.

Unfortunately, however, there have been incidents where people have meddled with its natural state. For example, an artist called Marco Evaristti once poured food colouring into it to make the eruption pink. He defended himself by claiming that nature was open to artists to utiltise and the fact the colouring was all-natural, but he became a pariah amongst many Icelanders, and was arrested and fined (though never paid it).

Silfra Fissure, situated in Þingvellir National Park in southwest Iceland, is one of the country's most visited and cherished natural wonders.

Geography

Roughly an hour’s drive from Reykjavik city centre, Silfra is a highly popular destination for snorkelers and scuba divers, with the fissure itself often ranking amongst the top ten dive sites internationally. The water is 2-4 degrees celsius all year round and offers visitors the opportunity to touch both the American and Eurasian tectonic plates simultaneously, an extremely rare feeling in itself.

Silfra is just one of thousands of fissures made up as part of a largely unmapped cave network underneath Thingvellir. The reasons for Silfra’s adulation particularly are, upon seeing it, self-explanatory. Firstly, there is the incredible water clarity. Visibility will often stretch beyond 100m, meaning the entire fissure, canyon walls and all, is in full and perfect view.

The incredible colour spectrums that this creates defies imagination. The water is so clear, for instance, that it refracts light in the same manner as a diamond, meaning, on bright days, that Silfra’s bottom is illuminated with rainbow patterns.

Þingvellir makes up part of the Mid-Atlantic rift valley, an area of fairly young magma fields (geologically speaking) that, continentally, does not exist. Water trickles down from the mighty Langjökull glacier, around 60km from Silfra, entering the cave network and taking up to a century to reach the fissure. This fascinating process began over 12,000 years ago.

Silfra also has a gentle current. This flow means that any sediment or floating particles kicked up by will quickly be pulled away, ensuring excellent visibility within minutes.

Þingvallavatn (anglicised to Thingvallavatn, ‘the Lake of the Fields of Parliament’) is a rift valley lake located roughly forty-minutes drive from Iceland’s capital city, Reykjavík.

Features of Thingvallavatn

Þingvallavatn is partially within the boundaries of Þingvellir National Park, Iceland’s oldest National Park and only one with UNESCO World Heritage Site status.

Covering an area of 84 square kilometres (32 square miles), Þingvallavatn is the largest natural lake in Iceland with its greatest depth measuring at 114 metres (374 feet). Þingvallavatn is situated on the Mid-Atlantic Rift, on a part of the ridge known as the Reykjanes Ridge.

The lake has only one outflow, the river Sog.

Of particular note to biologists and fishermen are the four morphs of Arctic Char that inhabit the lake. The lake’s char are an excellent example of species evolving to fit and adapt to a secluded environment; over ten thousand years, one species of Char has transformed into four different-sub branches. Other fish in the lake include the the Brown Trout and the Three-Spine Stickleback.

History and Geology

Þingvallavatn takes its name from the historical founding of the Alþingi, which occurred in 930 AD at what is now known as Þingvellir National Park. Þingvellir literally translates to ‘Fields of Parliament’.

The Alþingi was the first democratically elected representative parliament in world history (examples such as Ancient Athens were direct, not representative, democracies); Icelanders used to travel by foot or horseback simply to congregate at Þingvellir where they would hear the latest laws and judgements of the island.

Þingvellir National Park is also notable for its geology. Given its position on the Mid Atlantic Ridge, the park is one of the only places on the planet where visitors can see both the North American and Eurasian tectonic plates standing exposed from the earth.

Footpaths allow you to get up close and personal to the plates, standing right where the ancient settlers once did. In between the tectonic plates lies fields of dried volcanic rock, blanketed with a thick, yet fragile layer of Icelandic moss.

Scuba Diving in Thingvallavatn

Scuba diving around Þingvallavatn revolves around two sites, Silfra Fissure and Davíðsgjá (David’s Crack), the former being one of the most popular spots on the planet for snorkelling and underwater exploration.

Silfra Fissure is situated between the North American and Eurasian tectonic plates and is filled with crystal-clear glacial water originating from the Langjökull ice cap. The water measures at between two degrees Celsius all year round, with a slight current preventing the fissure from ever freezing over.

Davíðsgjá is found within Þingvallavatn and is often considered the darker and more dramatic cousin of Silfra Fissure, resembling the gorge formation so prevalent across the Mid Atlantic Rift.

Only certain tour operators provide tours into Davíðsgjá, so make sure to do some research beforehand if you are looking to access this dive site during your time in Iceland.